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Related Experiment Videos

Aripiprazole-induced parkinsonism.

Ashish Sharma1, James H Sorrell

  • 1Department of Psychiatry, University of Nebraska Medical Center, Omaha, 68198, USA. doctorshama@hotmail.com

International Clinical Psychopharmacology
|January 20, 2006
PubMed
Summary

Dopamine receptor blockade causes antipsychotic effects and side-effects. Aripiprazole, a novel antipsychotic, can paradoxically cause parkinsonism despite its unique mechanism.

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Area of Science:

  • Neuropharmacology
  • Psychiatry

Background:

  • Dopamine D2 receptor antagonism is key for antipsychotic efficacy but causes extrapyramidal side-effects (EPS).
  • Typical antipsychotics require 60-70% D2 receptor blockade for efficacy, with >75-80% leading to acute EPS.
  • Atypical antipsychotics generally have a lower propensity for EPS.

Observation:

  • A new class of antipsychotics, dopamine-serotonin system stabilizers, offer improved tolerability.
  • Aripiprazole is the first agent in this novel class.
  • This section presents a case study of a patient who developed parkinsonism while on aripiprazole treatment.

Findings:

  • The patient experienced parkinsonism during treatment with aripiprazole.
  • This case highlights a potential adverse effect of aripiprazole, despite its novel mechanism.

Implications:

  • This case suggests that even novel antipsychotics like aripiprazole may cause extrapyramidal symptoms.
  • Further research is needed to understand the full spectrum of aripiprazole's side-effect profile.
  • Clinicians should remain vigilant for parkinsonism in patients treated with aripiprazole.

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